Run internal tests in Cygwin (#1592)

.github/workflows/testing.yml

@@ -320,3 +320,40 @@ jobs:
         shell: bash
         run: |
           test/run-tests.sh
+
+  cygwin:
+    strategy:
+      matrix:
+        bits: [32, 64]
+        include:
+          - bits: 32
+            arch: x86
+          - bits: 64
+            arch: x86_64
+      fail-fast: false
+    runs-on: windows-2019
+    timeout-minutes: 30
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Setup Cygwin
+        uses: cygwin/cygwin-install-action@v4
+        with:
+          platform: ${{ matrix.arch }}
+          packages: >-
+            bison
+            gcc-g++
+            git
+            libpng-devel
+            make
+            pkg-config
+      - name: Build & install using Make
+        shell: C:\cygwin\bin\env.exe CYGWIN_NOWINPATH=1 CHERE_INVOKING=1 C:\cygwin\bin\bash.exe -o igncr '{0}'
+        run: | # Cygwin does not support `make develop` sanitizers ASan or UBSan
+          make -kj Q=
+          make install -j Q=
+      - name: Run tests
+        shell: C:\cygwin\bin\env.exe CYGWIN_NOWINPATH=1 CHERE_INVOKING=1 C:\cygwin\bin\bash.exe -o igncr '{0}'
+        run: | # Allow asm/test.sh to run `git describe` for the version test
+          git config --global --add safe.directory '*'
+          test/run-tests.sh --only-internal

test/gfx/rgbgfx_test.cpp

@@ -1,21 +1,5 @@
 /* SPDX-License-Identifier: MIT */
 
-// For `execProg` (Windows is its special little snowflake again)
-#if !defined(_MSC_VER) && !defined(__MINGW32__)
-	#include <sys/stat.h>
-	#include <sys/wait.h>
-
-	#include <signal.h>
-	#include <spawn.h>
-	#include <unistd.h>
-#else
-	#define WIN32_LEAN_AND_MEAN // Include less from `windows.h` to avoid conflicts
-	#include <windows.h>
-	#include <errhandlingapi.h>
-	#include <processthreadsapi.h>
-	#undef max // This macro conflicts with `std::numeric_limits<...>::max()`
-#endif
-
 #include <algorithm>
 #include <array>
 #include <cassert>
@@ -34,6 +18,22 @@
 
 #include "gfx/rgba.hpp" // Reused from RGBGFX
 
+// For `execProg` (Windows and POSIX spawn child processes differently)
+#if !defined(_MSC_VER) && !defined(__MINGW32__)
+	#include <sys/stat.h>
+	#include <sys/wait.h>
+
+	#include <signal.h>
+	#include <spawn.h>
+	#include <unistd.h>
+#else
+	#define WIN32_LEAN_AND_MEAN // Include less from `windows.h` to avoid conflicts
+	#include <windows.h>
+	#include <errhandlingapi.h>
+	#include <processthreadsapi.h>
+	#undef max // This macro conflicts with `std::numeric_limits<...>::max()`
+#endif
+
 static uintmax_t nbErrors;
 
 static void warning(char const *fmt, ...) {
@@ -308,23 +308,13 @@ static char *execProg(char const *name, char * const *argv) {
 		return strerror(err);
 	}
 
-	siginfo_t info;
+	if (int info; waitpid(pid, &info, 0) == -1 || !WIFEXITED(info)) {
-	if (waitid(P_PID, pid, &info, WEXITED) != 0) {
 		fatal("Error waiting for %s: %s", name, strerror(errno));
-	} else if (info.si_code != CLD_EXITED) {
+	} else if (int status = WEXITSTATUS(info); status != 0) {
-		assert(info.si_code == CLD_KILLED || info.si_code == CLD_DUMPED);
-		fatal(
-		    "%s was terminated by signal %s%s\n\tThe command was: [%s]",
-		    name,
-		    strsignal(info.si_status),
-		    info.si_code == CLD_DUMPED ? " (core dumped)" : "",
-		    formatArgv()
-		);
-	} else if (info.si_status != 0) {
 		fatal(
 		    "%s returned with status %d\n\tThe command was: [%s]",
 		    name,
-		    info.si_status,
+		    status,
 		    formatArgv()
 		);
 	}
@@ -359,26 +349,7 @@ static char *execProg(char const *name, char * const *argv) {
 
 	STARTUPINFOA startupInfo;
 	GetStartupInfoA(&startupInfo);
-	STARTUPINFOA childStartupInfo{
+	STARTUPINFOA childStartupInfo = {sizeof(startupInfo)};
-	    sizeof(startupInfo),
-	    nullptr,
-	    nullptr,
-	    nullptr,
-	    0,
-	    0,
-	    0,
-	    0,
-	    0,
-	    0,
-	    0,
-	    0,
-	    0,
-	    0,
-	    nullptr,
-	    0,
-	    0,
-	    0,
-	};
 
 	PROCESS_INFORMATION child;
 	if (CreateProcessA(

test/run-tests.sh

@@ -8,11 +8,13 @@ usage() {
 	echo "Options:"
 	echo "    -h, --help          show this help message"
 	echo "    --only-free         skip tests that build nonfree codebases"
+	echo "    --only-internal     skip tests that build external codebases"
 }
 
 # Parse options in pure Bash because macOS `getopt` is stuck
 # in what util-linux `getopt` calls `GETOPT_COMPATIBLE` mode
 nonfree=true
+external=true
 FETCH_TEST_DEPS="fetch-test-deps.sh"
 while [[ $# -gt 0 ]]; do
 	case "$1" in
@@ -24,6 +26,9 @@ while [[ $# -gt 0 ]]; do
 			nonfree=false
 			FETCH_TEST_DEPS="fetch-test-deps.sh --only-free"
 			;;
+		--only-internal)
+			external=false
+			;;
 		--)
 			break
 			;;
@@ -49,6 +54,10 @@ for dir in asm link fix gfx; do
 	popd
 done
 
+if ! "$external"; then
+	exit
+fi
+
 # Test some significant external projects that use RGBDS
 # When adding new ones, don't forget to add them to the .gitignore!
 # When updating subprojects, change the commit being checked out, and set the `shallow-since`